#!/usr/bin/env python
# vim:fileencoding=utf-8

from calibre.web.feeds.news import BasicNewsRecipe


class LWNFree(BasicNewsRecipe):
    title = 'LWN Linux Weekly News (Free)'
    language = 'en'
    __author__ = 'yodha8'
    description = "LWN is published every Thursday. This recipe skips current week's articles (subscriber-only) and pulls free articles from previous week."
    oldest_article = 28  # So we can grab previous week articles.
    max_articles_per_feed = 100
    extra_css = '.FeatureByline { font-size:small; }'

    keep_only_tags = [dict(name='div', attrs={'class':['ArticleText', 'PageHeadline']})]
    remove_tags = [dict(name='blockquote', attrs={'class':'ad'}), dict(name='form')]

    feeds = [
        ('LWN Articles', 'https://lwn.net/headlines/Features'),
    ]

    def parse_feeds(self):
        '''Remove paid articles and articles older than a week.'''

        prev_feeds = super().parse_feeds()

        remove_articles = []
        weekly_count = 0

        for article in prev_feeds[0]:

            # Paid article
            if '[$]' in article.title:
                remove_articles.append(article)
                continue

            # Count how many free weekly edition we passed
            if 'Weekly Edition' in article.title:
                weekly_count += 1
                remove_articles.append(article)

            # Remove all articles starting from 2nd free weekly edition
            if weekly_count > 1:
                remove_articles.append(article)

        # Remove everything but prev week's free articles
        for pa in remove_articles:
            prev_feeds[0].remove_article(pa)

        return prev_feeds
